<template>
  <div class="com-container" >
    <div class="com-chart" ref="rank_ref"></div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      charInstance: null,
      allData: null,
      startValue:0,//区域缩放的起点值
      endValue:9,//区域缩放的终点值
      timerId:null,
    };
  },
    created () {
    // 在组件创建完成之后 进行回调函数的注册
    this.$socket.registerCallBack('rankData', this.getData)
  },
  mounted() {
    this.iniChart();
        this.$socket.send({
      action: 'getData',
      socketType: 'rankData',
      chartName: 'rank',
      value: ''
    })
    window.addEventListener("resize", this.screenAdapter);
    this.screenAdapter();
  },
  destroyed() {
    window.removeEventListener("resize", this.screenAdapter);
    clearInterval(this.timerId)
    this.$socket.unRegisterCallBack('rankData')
  },
  methods: {
    iniChart() {
      this.charInstance = this.$echarts.init(this.$refs.rank_ref, "chalk");
      const initOption = {
        title: {
          text: "▎地区销售排行",
          left: 20,
          top: 20,
        },
        grid: {
          top: "40%",
          left: "5%",
          right: "5%",
          bottom: "5%",
          containLabel: true,
        },
        tooltip: {
          show: true,
        },
        xAxis: {
          type: "category",
        },
        yAxis: {
          type: "value",
        },
        series: [
          {
            type: "bar",
          },
        ],
      };
      this.charInstance.setOption(initOption);
      this.charInstance.on('mouseover',()=>{
          clearInterval(this.timerId)
      })
      this.charInstance.on('mouseout',()=>{
          this.startInterval()
      })
    },
    async getData(ret) {
     // const { data: ret } = await this.$http.get("rank");
      this.allData = ret;
      this.allData.sort((a, b) => {
        return b.value - a.value;
      });
      // console.log(this.allData);
      this.updateChart();
      this.startInterval();
    },
    updateChart() {
      const colorArr = [
        ["#0BA82C", "#4FF778"],
        ["#2E72BF", "#23E5E5"],
        ["#5052EE", "#AB6EE5"],
      ];
      const provinceArr = this.allData.map((item) => {
        return item.name;
      });
      const valueArr = this.allData.map((item) => {
        return item.value;
      });
      const dataOption = {
        xAxis: {
          data: provinceArr,
        },
        dataZoom:{
            show:false,
            startValue:this.startValue,
            endValue:this.endValue,
        },
        series: [
          {
            data: valueArr,
            itemStyle: {
              color: (arg) => {
                let targetColorArr = null;
                if (arg.value > 300) {
                  targetColorArr = colorArr[0];
                } else if (arg.value > 200) {
                  targetColorArr = colorArr[1];
                } else {
                  targetColorArr = colorArr[2];
                }
                return new this.$echarts.graphic.LinearGradient(0, 0, 0, 1, [
                  {
                    offset: 0,
                    color: targetColorArr[0],
                  },
                  {
                    offset: 1,
                    color: targetColorArr[1],
                  },
                ]);
              },
            },
          },
        ],
      };
      this.charInstance.setOption(dataOption);
    },
    screenAdapter() {
      const titleFontSize=this.$refs.rank_ref.offsetWidth/100*3.6
      const adapterOption = {
          title:{
              textStyle:{
                  fontSize:titleFontSize
              }
          },
          series:[
              {
                  barWidth:titleFontSize,
                  itemStyle:{
                      barBorderRadius:[titleFontSize/2,titleFontSize/2,0,0]
                  }
              }
          ]
      };
      this.charInstance.setOption(adapterOption);
      this.charInstance.resize();
    },
    startInterval(){
        if(this.timerId){
            clearInterval(this.timerId)
        }
        this.timerId=setInterval(()=>{
            this.startValue++;
            this.endValue++;
            if(this.endValue>this.allData.length-1){
                this.startValue=0;
                this.endValue=9;
            }
            this.updateChart()
        },2000)
    }
  },
};
</script>

<style>
</style>